Theswitch statement is a useful selection statement when there are many values that require different logic.
Here is a program that asks the user to enter a day number (1-7) and outputs the full name of that day of the week.
First, import the Scanner class (for user input), declare the class name, and declare the main method:
importjava.util.Scanner;publicclassDays{publicstaticvoidmain(String[]args){Next, declare a Scanner variable and create the object. This object will retrieve user input later:
Scannerin=newScanner(System.in);Declare a variable to store the user input:
intdayNum;Ask the user to enter a number:
System.out.print("Enter a day number (1-7): ");Use the Scanner object to retrieve the user input. Note that the program will wait here until the user types a value and presses Enter:
dayNum=in.nextInt();Create aswitch statement that switches on the dayNum variable:
switch(dayNum){Inside theswitch statement, add cases for each day. For example, the value1 will output Monday:
case1:System.out.println("Monday");break;Here are the other cases. Note that case5 also outputs TGIF:
case2:System.out.println("Tuesday");break;case3:System.out.println("Wednesday");break;case4:System.out.println("Thursday");break;case5:System.out.println("Friday");System.out.println("TGIF!");break;case6:System.out.println("Saturday");break;case7:System.out.println("Sunday");break;The last case is a default case. This case occurs when the dayNum value has a number outside the range 1-7:
default:System.out.println("Invalid day number.");break;Finally, add the closing curly brackets for theswitch statement, main method, and class:
}}}Here is the complete program:
importjava.util.Scanner;publicclassDays{publicstaticvoidmain(String[]args){Scannerin=newScanner(System.in);intdayNum;System.out.print("Enter a day number (1-7): ");dayNum=in.nextInt();switch(dayNum){case1:System.out.println("Monday");break;case2:System.out.println("Tuesday");break;case3:System.out.println("Wednesday");break;case4:System.out.println("Thursday");break;case5:System.out.println("Friday");System.out.println("TGIF!");break;case6:System.out.println("Saturday");break;case7:System.out.println("Sunday");break;default:System.out.println("Invalid day number.");break;}}}Thanks for reading. 😃
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